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中文摘要：
制备了4种不同粒度的平三煤和大友煤煤粉，分别采用低温饱和氮气吸附的方法和热天平研究了煤粉的表面结构特性和煤粉的燃烧特性。实验结果表明：随着煤粉粒度的减小，煤粉的孔隙结构发生变化，比表面积和孔客积均增大，表面结构复杂，致使分形维数增大，有利于煤粉颗粒的燃烧，因此，平三煤的着火温度降低了14℃，表观活化能均降低了12．3KJ／mol，燃尽率提高了9．81％，大友煤的燃烧特性变化规律相似。此外，煤粉颗粒的分形维数还能在一定程度上表述煤粉的燃烧特性，因此，分形维数可为煤粉燃烧特性的评价提供一种新的途径。
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